过载继电器，NRE8-40 20-40A 上海临嘉科教仪器有限公司

p1Src=//y1.yzimgs.com/uploads/391770/20250116-08683175.jpg&p2Src=//y1.yzimgs.com/uploads/391770/20250116-17572062.jpg&p3Src=//y1.yzimgs.com/uploads/391770/20250116-96361951.jpg